Climate Change Vulnerability Index
Climate change vulnerability assessments were conducted for 85 species
in Pennsylvania using the Climate Change Vulnerability Index (CCVI v2.0)
developed by NatureServe.
The CCVI allows the user to examine the exposure and sensitivity of
a species to a series of risk factors associated with climate change.
Presented below are the results of the vulnerability assessments along
with the S and G-ranks for each species. The S and G-ranks provide demographic
information not contained in the CCVI that should be used in concert with the
CCVI scores when interpreting overall results. Definitions for the CCVI scores
are provided at the end of the table and each species is
linked to a summary sheet that describes the factors contributing most to their
climate change vulnerability. Additional information is available in the final
report. Definitions of the state and global rank codes can be found here.
Definitions of CCVI Scores
Extremely Vulnerable: Abundance and/or range extent within geographical area assessed extremely likely to substantially decrease or disappear by 2050.
Highly Vulnerable: Abundance and/or range extent within geographical area assessed likely to decrease significantly by 2050.
Moderately Vulnerable: Abundance and/or range extent within geographical area assessed likely to decrease by 2050.
Not Vulnerable/Presumed Stable: Available evidence does not suggest that abundance and/or range extent within the geographic area assessed will change (increase/decrease) substantially by 2050. Actual range boundaries may change.
Not Vulnerable/Increase Likely: Available evidence suggests that abundance and/or range extent within geographic area assessed is likely to increase by 2050.